This standard specifies the classification, technical requirements, test methods, inspection rules, packaging, storage, transportation, marking and quality certificate of ferromanganese. This standard is applicable to ferromanganese produced by electric furnaces and blast furnaces as a deoxidizer, desulfurizer and alloying agent in steelmaking and casting. GB/T 3795-1996 Ferromanganese GB/T3795-1996 Standard download decompression password: www.bzxz.net

GB/T3795-:1996
In order to improve the ferroalloy standard system, this standard combines the national standard GB3795 "Ferromanganese" and the national standard GB4007 "Blast furnace ferromanganese" into one standard, and puts forward different requirements according to different processes, and adds product classification content. This standard was formulated in 1959, revised for the first time in 1983, and revised for the first time in 1987. From the date of implementation of this standard, it replaces GB 3795-87 and GR 4007-83. This standard was proposed by the Ministry of Metallurgical Industry of the People's Republic of China. This standard is under the jurisdiction of the Information Standards Research Institute of the Ministry of Metallurgical Industry. This standard was drafted by Shanghai Zhongjia Ferroalloy Co., Ltd. and Xinyu Iron and Steel Co., Ltd. The main drafters of this standard are Chen Zhenhua, Qian Zonghua, Zhang Shaochun, and Wang Guowen. 1 Scope
National Standard of the People's Republic of China
Ferromanganesc
GB/37951996
Generation GH 379587
GB 400783Www.bzxZ.net
This standard specifies the classification, technical requirements, test methods, inspection rules, packaging, storage and transportation, marking and quality certificate of ferromanganese. This standard is applicable to ferromanganese produced by electric furnaces and blast furnaces as a deoxidizer, desulfurizer and metal element addition agent in steelmaking and casting. 2 Referenced Standards
The provisions contained in the following standards constitute the provisions of this standard by being cited in this standard. When this standard is published, the versions shown are valid. All standards will be revised. All parties using this standard should explore the possibility of using the latest versions of the following standards: GB3655083 Ferroalloy acceptance, packaging, storage, transportation, marking and quality certification regulations G13/T 4010-D4 Ferroalloy chemical analysis sample collection and preparation GH3730.1-87 Ferromanganese and blast furnace ferromanganese chemical analysis method: Determination of manganese content by potentiometric titration GB7730.2-87 Ferromanganese and blast furnace ferromanganese chemical analysis method: Determination of silicon content by perfluoric acid dehydration redevelopment method Chemical analysis method of ferromanganese and blast furnace ferromanganese by electrometric titration GB 7730.3-87 Ferromanganese and blast furnace ferromanganese chemical analysis method: Determination of phosphorus by spectrophotometric titration GB 7730.487
GR7730.588 Chemical analysis method for ferromanganese and blast furnace ferromanganese: infrared absorption method for determination of content GB7730.688 Chemical analysis method for ferromanganese and blast furnace ferromanganese: gas volumetric method for determination of content
GB7730.7—88 Chemical analysis method for ferromanganese and blast furnace ferromanganese: tablet method, gravimetric method, carbon pad method
GB7730.8—88 Chemical analysis method for ferromanganese and blast furnace ferromanganese: infrared absorption method Determination of sulfur content GB7730.9--88 Chemical analysis methods for ferromanganese and blast furnace ferromanganese Combustion neutralization titration method Sulfur content
GB/T1324791 Sampling and detection methods for particle size of ferroalloy products 3 Product classification
Ferromanganese is divided into 3 categories according to its carbon content: low carbon category: carbon content is not more than 0.7%;
medium carbon category: carbon content is greater than 0.7% to 2.0%;
high carbon category: carbon content is greater than 2. 0% to 8.0%, 4 Technical requirements
4.1 Brand and chemical composition
4.1.1 Electric furnace manganese ore is divided into 9 brands according to the different manganese and impurity contents. Its chemical composition should comply with the provisions of the table. Approved by the State Bureau of Technical Supervision on September 27, 1996
Implementation on March 1, 1997
FeMn8B C0.2
FeMn84C9.4
FeMn4Ca.7
FeMr2r:1c
FeMn82C1.5
FeMn78C2.
F:Mn78CH-0
FeMn74C:7.5
FeMn68C7.0
CB/T 3795 1996
Table 1 Chemical composition of electric furnace ferromanganese
Chemical composition, %
85.0-92.0
50. 0~87. 0
80. 0~ 87. 0
7H.0--85. 0
75. 0~82.
75. 0--82.0
70.0~-77.0
65. (072.1
Blast furnace ferromanganese is divided into 5 grades according to the different manganese and impurity contents. Its chemical composition should meet the requirements of Table 2. Table 2 Chemical composition of blast furnace ferromanganese
Chemical composition.%
FrMn7x
FeMn74
FeMr6s
FeMn58
75.0~82.5
.0~77.0
65.0~~22. 8
6t, 0~-67. C
When the buyer has special requirements for chemical separation, it can be negotiated by the supply and demand parties. 4.2
4.3 Physical state
Ferromanganese is delivered in block form, and its particle size range meets the requirements of Table 3. 4. 3. 1
Table 3 Particle size range
Jiangshan carbon manganese powder
20~350
14~-50
0. 097--9. 45
Sieve F hook
Deviation, %
Not more than
Medium and low carbon
High carbon
GB/T 3795—1996
4.3.2 If the purchaser has special requirements for the product particle size, the supply and demand parties can negotiate separately. 5 Test method
5.1: Sampling and sample preparation
The sampling and preparation of samples for chemical analysis of ferromanganese shall be carried out in accordance with GB/T4010. 5.2 Chemical analysis method
The chemical analysis method of ferromanganese shall be carried out in accordance with CB7730,1~7730.9. 5.3 Particle size inspection
Particle size inspection of ferromanganese shall be carried out in accordance with GR/T13247: 6 Inspection rules
6.1 Quality inspection and acceptance
Quality inspection and acceptance of ferromanganese shall comply with the provisions of (GB3650: 6.2 Batch
Bulk ferromanganese shall be delivered in batches of the same brand and group level within the fluctuation range of manganese content not more than 4%, and barreled products shall be delivered in batches of the same brand and group level.
7 Packaging, storage, transportation, marking and quality certificate7.1 Packaging||t t||7.1.1 Medium and low carbon ferromanganese is usually packed in iron barrels, 100k kg per barrel. Other forms of packaging can be used after negotiation between the supply and demand parties. There should be obvious signs on the outside of the package. 7.1.2 High carbon ferromanganese is usually delivered in bulk, but can also be packed in containers or woven bags after negotiation between the supply and demand parties. If it is delivered in packaging, there should be obvious signs on the outside of the package. 7.2 Storage, transportation, marking and quality certificate
The storage, transportation, marking and quality certificate of various types of ferromanganese shall comply with the provisions of GB3G50:
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